Noun. 1. drainage basin-the entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet; flood control in the Missouri basin. catchment area, catchment basin, drainage area, river basin, watershed, basin.
Milkman syndrome. a generalized bone disease marked by multiple transparent stripes of absorption in the long and flat bones. Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition.
Milk snake. Lampropeltis triangulum, commonly known as a milk snake or milksnake, (French: Couleuvre tachetÃ©e; Spanish: Culebra-real coralillo) is a species of king snake. There are 24 subspecies of milk snakes.